- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
An obsolete term for a pyroxene between enstatite and augite in composition.
Industry:Mining
An obsolete term for a quarry, an open or surface mineral working, usually for the extraction of building stone, as slate, limestone, etc.
Industry:Mining
An obsolete term for a time of profound orogeny and other crustal movements, on a continentwide or even worldwide scale, the assumption being that such revolutions produced abrupt changes in geography, climate, and environment. See: orogeny
Industry:Mining
An obsolete term for a type of surface wave that is similar to a Rayleigh wave but has an opposite particle motion.
Industry:Mining
An obsolete term for a type of surface wave that is similar to a Rayleigh wave but has an opposite particle motion.
Industry:Mining
An obsolete term for an iron meteorite remarkable for a high proportion of nickel.
Industry:Mining
An obsolete term for any large rock mass lying on the surface of the ground or embedded in the soil, differing from the country rock of the region, such as an erratic.
Industry:Mining
An obsolete term for any large rock mass lying on the surface of the ground or embedded in the soil, differing from the country rock of the region, such as an erratic.
Industry:Mining
